Venus is the hottest planet in our solar system. The surface temperature on Venus is a burning 461.85 °C (863.33 °F). On Pluto it is so cold that liquid nitrogen turns to solid! Pluto's estimated surface temperature is around -228°C (-378°F).
The first man in space boarded the Russian spacecraft Vostok 1 in April 12, 1961 with a 50-50 chance of survival. The spacecraft orbited the earth for one hour and 48 minutes and returned successfully.
The distance from the Earth to the sun is 92 million miles (146 million km). Even at the incredible speed of light, it takes 8 minutes for the sun's light rays to reach us once they leave the sun.
Dust storms sometimes cover the planet of Mars for months at a time. The storms, powered by solar heating, can envelop the entire planet in just days.
The densest planet in our solar system is our own Earth. The least dense is Saturn. If all the planets were placed in a massive ocean, only Saturn would float.
Earth's gravity field extends well into outer space. It's strong enough to keep our moon in place, and will eventually pull back all the satellites we have launched into orbit.
Mars has the tallest mountain known in our solar system, known as Olympus Mons. The mountain rises a whopping 16.8 miles (or 27 kilometers).
The planet Venus is named after the Roman goddess of love. It is the brightest planet in the night sky and the only planet to be named after a female.
The earth spins around the sun at 66,480 miles/h (107,000 km/h). It takes a year to travel completely around, a distance of 584 million miles (940 million kilometers).
In space, astronauts eat tortillas instead of bread due to safety reasons. Bread crumbs could get loose and damage delicate equipment on the spacecraft.
The planet Saturn has 62 moons. One of it's moons named Titan is the only one in our solar system known to have an atmosphere.
The "Solar Challenger" is a solar powered plane that was built in 1980 with the ability to fly using only the energy provided by sun. It's longest flight was 160 miles (260km), completed without the use of any batteries.
It takes 100,000 years for a space ship traveling at the speed of light to travel our galaxy (the Milky Way) from one end to the other.
The drawf planet Pluto was named by the suggestion of an 11 year old, Venetia Burney from Oxford England. Her suggestion was voted on unanimously by the observatory that discovered the dwarf planet.